diff --git a/init-k8s.sh b/init-k8s.sh
index 9ddc530..33d417b 100644
--- a/init-k8s.sh
+++ b/init-k8s.sh
@@ -253,7 +253,7 @@ etcd:
     dataDir: /var/lib/etcd
 imageRepository: $MIRRORS
 kind: ClusterConfiguration
-kubernetesVersion: $K8S_VERSION
+kubernetesVersion: "$K8S_VERSION"
 networking:
   dnsDomain: cluster.local
   podSubnet: $pod_subnet